QUOTE(digilife @ Oct 28 2012, 08:26 PM)
The signal interference from the step down transformer is killing your 3G signal dude.............
Cant you just buy an AC Fan

Actually Its not killing my signal strength, still maintain at below 20% even before installing the power supply..
Im using this power supply because i can add maximum 5-6 cooling Fan.
AC fan can harm to my kids.
Added on October 29, 2012, 10:25 amQUOTE(chuahcs79 @ Oct 28 2012, 08:35 PM)
90 cfm , but how many Am or V the fan need ?
still think direct modify it to connect AC power much easier and take so much space

Only 0.45Amp , 12VDC....
DC current is safe for childrens and even cheaper that AC. Mostly AC Fan Blade are from Metal
Safety come first..
Actually you can use AC-DC Adapter to save the space (Adjustable Voltage 3V-12V) . The power supply that i bought , i can use for others DC application, not just for cooling fan only.
This post has been edited by hairul: Oct 29 2012, 11:48 AM